Hi everybody,
First idea I had was a fire crystal ignore type usable. It would be like you buy it and grind heat for an hour without having to use firecrystals and it would automatically level up(Like the wee 'ol days). I would definitely buy that...Ok anyway,
Next idea was a Randomized Lockdown. This would be a game mode where your team is given a random selection of two weapons and you decide as a team what the weapons are then the whole team uses only those weapons.